Origin of the name DEEDEE.
Etymology of the name DEEDEE.
Meaning of the baby name DEEDEE.

DEEDEE. A
pet form of English Edith
(q.v.), meaning "rich-gift." Also spelled Didi.
Deedee Corradini was Salt Lake City's first female
mayor, having served from 1992 to 2000. (Wiki)

Just
figger to yourself that it's sundown, and the blinds pulled down in
the room where Deedee's cot was standin' like a little iron-barred
cage. We got into the way of callin' the kid Deedee, that bein'
what she called herself. There was all the signs that Deedee was
goin' to sleep, and the plainest sign was Deedee herself, standin' up
in her crib, wide awake, holdin' on to the foot of the crib, trampin'
the sheets into a tangle of white underbrush, as you might say, and no
more asleep than you are. The way Deedee went to sleep was like
the death of an alligator—it was a long and strenuous affair...
...
"Edith," I says in the hard voice she was
n't acquainted with; "Lie down and go to sleep. I don't
want to have no more of this. Go to sleep!"
I heard the dinner bell tinkle from the dinin'-room,
and I helped Marthy to git up, and we went out, and left Deedee alone
in the dark... (The Confessions of a Daddy, Butler, 1907).